Supplement Scholar
Compound

EGCG (Green Tea Catechin)

Buy on Amazon ↗

Affiliate link: we may earn a commission at no extra cost to you. Disclosures

EGCG (Green Tea Catechin). Potent CYP/COMT-modulating antioxidant — popularized in MDMA harm-reduction stacks.

How it works. Inhibits CYP2D6 (caution with substrate drugs) and serves as a strong antioxidant; binds and inactivates quinone metabolites.

What the research supports. 1 graded claims. Strongest: Reduces oxidative stress from amphetamine-class metabolites (in vitro/animal) (limited).

How much to take. Typical dose: 200–400 mg EGCG before/after; do not exceed 800 mg/d.

Side effects and interactions. 2 medication interactions listed. Serious: Hepatotoxicity (rare, dose-related).

Stacking. Pairs well with NAD+ precursor (NMN or NR), Omega-3.

Common forms. Available as Capsule or softgel, Powder, Sublingual or buccal, Liposomal liquid.

Key studies. 8 studies cited. The strongest are listed with links to PubMed.

Community. Experiences from people who have tried EGCG (Green Tea Catechin). Anecdotes are not medical advice.

EGCG (Green Tea Catechin). Potent CYP/COMT-modulating antioxidant — popularized in MDMA harm-reduction stacks.

Molecular structureC22H18O11 · 458.4 g/mol

What it is

Potent CYP/COMT-modulating antioxidant — popularized in MDMA harm-reduction stacks.

Food sources

Endogenously produced or biosynthesized moleculeStandardized pharmaceutical- or food-grade supplementCombined with cofactors that improve absorption or activity

Goals

Pre-Drug Use SupportPost-Drug Use RecoveryHealthy Aging

How it works

Inhibits CYP2D6 (caution with substrate drugs) and serves as a strong antioxidant; binds and inactivates quinone metabolites.

Pathways

  • CYP2D6 inhibition
  • Antioxidant
  • MAO modulation

Effects

  • ↓oxidative stress from amphetamine-class metabolites (in vitro/animal) decreases

What the research supports

Reduces oxidative stress from amphetamine-class metabolites (in vitro/animal)limited

Strong: consistent results across large trials or meta-analyses. Moderate: several trials, mostly positive. Limited: small or mixed studies. Preclinical: animal or cell research only.

Typical dose
200–400 mg EGCG before/after; do not exceed 800 mg/d
TimingConsistent daily timing recommended; split larger doses if GI tolerance is a concern.
With foodWith food (reduces hepatotox risk)
Best formMost evidence is based on the capsule or softgel form.
Shop EGCG (Green Tea Catechin) on Amazon ↗

As an Amazon Associate I earn from qualifying purchases. Look for USP, NSF or Informed Sport seals before you buy.

Side effects & interactions

Serious

  • Hepatotoxicity (rare, dose-related)

Medication interactions

CYP2D6 substratesmoderate

Inhibits CYP2D6 — may unpredictably raise levels.

Anticoagulantsmoderate

Antiplatelet effect.

Check any supplement–medication combination with your pharmacist before starting.

Combines with

Pairs well

  • NAD+ precursor (NMN or NR)Complementary mitochondrial and sirtuin support.
  • Omega-3Lowers inflammation and supports membrane integrity.

Common forms

  • Capsule or softgel
  • Powder
  • Sublingual or buccal
  • Liposomal liquid

Key studies

8 studies cited in total.

PubMed: EGCG (Green Tea Catechin) — Reduces oxidative stress from amphetamine-class metabolites ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching EGCG (Green Tea Catechin) and "Reduces oxidative stress from amphetamine-class metabolites". Filter by RCT, meta-analysis, or year on the results page.

PubMed: EGCG (Green Tea Catechin) — randomized controlled trial ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching EGCG (Green Tea Catechin) and "randomized controlled trial". Filter by RCT, meta-analysis, or year on the results page.

PubMed: EGCG (Green Tea Catechin) — meta-analysis ↗
Systematic review · PubMed (NLM) · 2026

Opens current human and preclinical literature matching EGCG (Green Tea Catechin) and "meta-analysis". Filter by RCT, meta-analysis, or year on the results page.

Discussion

Loading discussion…